# 新建元组  列表 []  list()
tuple1 = ()
tuple2 = tuple()

print(type(tuple1))
print(type(tuple2))

tuple3 = (['zhangsan', 90], ['zhangsan', 90], ['zhangsan', 90])
print(tuple3[1][0])
# 如果元组内容只有一个呢？ （90） 你会理解元素算数运算   （2+2）*2
tuple4 = (90,)
print(type(tuple4))
tuple3[1][0] = 'lisi'
# tuple3[1] = 'wangwu'
print(tuple3)
